login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A006400 Number of connected planar maps without vertices of degree 1.
(Formerly M1404)
0
1, 1, 2, 5, 11, 33, 117, 431, 1755, 7485 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,3
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
Timothy R. Walsh, Generating nonisomorphic maps without storing them, SIAM J. Algebraic Discrete Methods 4 (1983), no. 2, 161-178.
CROSSREFS
Sequence in context: A056365 A276548 A353016 * A254342 A080068 A226919
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(11) and a(12) from Sean A. Irvine, Mar 30 2017
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 23 18:28 EST 2024. Contains 370283 sequences. (Running on oeis4.)